Assessment of curve of spee in different malocclusions

Year 2018, Volume: 52 Issue: 3, 127 - 130, 01.09.2018

Gülşilay Sayar , Hüsamettin Oktay

Abstract

DOI: 10.26650/eor.2018.475

Purpose

The aim of this study was to compare the
depth of curve of Spee (COS) in Angle Class I, Angle Class II and Angle Class
III malocclusions.

Materials and methods

The Samples were chosen among the
diagnostic materials in İstanbul Medipol University Department of Orthodontics.
Ninety plaster models were chosen, and were divided into 3 groups (n=30)
according to Angle dental malocclusion classification. The depth of curve of
Spee was measured on left and right sides of mandibular dental models and mean
values were used as depth of curve of Spee. ANOVA test was used to evaluate
normally distributed data. Comparison of the sides were performed by using
paired sample t test. Significance level was set to p<0.05.

Results

The depth of COS was found as deepest in
Class II malocclusion (2.9±0.8 mm) and was relative flat in Class III
malocclusion (2.1±0.9 mm) and the difference was statistically significant
(p<0.05). No significant difference was found between Angle Class I and
Class III malocclusions.

Conclusion

Since the depth of curve of Spee is
increased in Class II malocclusions, this factor should be considered in treatment
planning.

Keywords

Curve of spee; malocclusion; angle classification; mandible; orthodontics

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